New Ahrefs v3 API: We will be upgrading to the new Ahrefs API on 18th October. All customers will need to re-authenticate the Ahrefs integration after the upgrade. Here is a blog post on the migration
SEMrush is an independent company that shows which keywords that the domains rank for, the total number of searches done per month, cost of traffic. The various metrics are given below
SEMrush Rank: This is a rank of all the domains in the internet based on total searches that the domain ranks for
Keywords: The total keywords that the domain ranks for
Monthly Organic Traffic: Total traffic coming to the domain every month based on the SERP rankings
Cost of traffic: The total cost of traffic coming to the website - this is based on total traffic, cost per click for the keyword and location of the user.
Keyword data: We list the top 5 keywords that the domain ranks for along with it's position, the search volume, cpc, competition and the url that ranks for that keyword.